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chemical reaction

reactions and stuff

Chemistry Is the study of the properties of matter and how it changes.
Element Is a substance that cannot be broken down into another substance by chemical or physical change.
Compound Is a substance made of two or more elements chemically combined in a specific ratio, or proportion.
Mixture Is made of two or more pure substances - elements, compounds, or both - that are in the same place but not combined as a new material.
Solution Is a well-mixed mixture.
Physical change A change that alters the form or appearance of a material but does not make the material into another substance.
Chemical change A change in matter that produces new substances.
Precipitate A solid that forms from solution during a chemical reaction.
Atom The smallest particle of an element.
Molecule Is the combination of two or more atoms.
Chemical bond The force that holds atoms together.
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